DOUGLASVILLE, Georgia - The daughters of a Georgia mother and grandmother killed when authorities say a Pelham man rammed her vehicle at a stop light and then intentionally ran her over said they are devastated and outraged.

"Imagine your mother minding her own business and being killed brutally,'' 28-year-old Nakeeta Davis told AL.com Friday. "This man was out to kill. He didn't stop until he got what he was after."

Dewey Calhoun Green, 23, is charged with murder, aggravated assault and aggravated battery. He was arrested Wednesday, just after police say he killed 53-year-old Janice Pitts. He had his first court appearance Friday, where a Douglas County Judge denied bond for Green.

Green is the grandson of W. Cooper Green, who served as mayor of Birmingham from 1940 until 1953 and for many years served as president of the Jefferson County Commission.

Douglas County Acting District Attorney Brian Fortner told AL.com Friday there likely would be additional charges against Green involving the other occupants who were in Pitts' car. Authorities are still awaiting results of toxicology testing of Green.

An appointed attorney was with Green in court Friday, but Fortner said the family plans to hire their own attorney.

Pitts was killed in front of her daughter and 4-year-old grandson, who both were in the family's SUV. The attack happened Wednesday when Pitts was stopped at a traffic light in the southbound turn lane on Highway 5. She was waiting to turn left onto Douglas Boulevard when police say Green, for no apparent reason, rear-ended Pitts' vehicle. Green, police said, was driving his expensive, tricked-out pickup truck.

He backed up and rammed her vehicle again, and then a third time, police said. "My mother thought he was done so she got out and went to check the back window, and check on my nephew,'' said Davis, whose sister Iesha was in the car with their mother.

While Pitts was checking the damage, Davis and police said, Green slammed his truck into Pitts, pinning her between the two vehicles. "He's holding his foot down on the gas. He has rage in his eyes and he's looking right at my sister,'' Davis said. "He was squeezing my mom. He kept his foot on that gas for almost two minutes."

Davis said her sister banged on Green's window and pleaded with him to stop. He finally backed up, and Pitts' fell to the ground. "She dropped like a Raggedy Ann doll,'' Davis said.

Police said he ran over Pitts' as he was trying to leave, and then backed up over her again before he tried to get away. "He wasn't done after he smashed her up against the car,'' Davis said.

Green drove a short distance and went up an embankment where his car came to a stop. Witnesses took the car keys from him, and detained him until police arrived on the scene. "A lot of good people blocked him off and held him,'' Davis said. "He was trying to get away."

Douglasville police Chief Chris Womack said investigators have no idea why Green did what he did. There is no indication he knew Pitts, and police don't believe it was a road-rage incident. "Obviously we believe this young man wasn't in the right frame of mind,'' Womack told AL.com Thursday.

Media outlets in Atlanta reported Pitts was pregnant at the time of her death, but police and prosecutors said Friday that the autopsy showed she was not pregnant.

Alabama court records show he had several traffic issues in Alabama, including a reckless driving conviction in 2011 when he was clocked driving 99 mph as he passed a vehicle in the median on Interstate 85 in Montgomery.

Law enforcement officials in Alabama are familiar with Green. He was arrested in 2009 but was granted youthful offender status so authorities couldn't discuss the case or even the charges against him. He was also the subject of a harassment probe in 2011 involving the Caritas of Birmingham, a ministry based in Shelby County, but no charges were ever filed against him in that case.

There were also other incidents of traffic violations and criminal mischief but, again, Green was a juvenile so authorities can't discuss those cases. Georgia officials said Green had drug arrests both in Alabama and Florida, again as a youthful offender.

Green attended Pelham High School, and was raised in a quiet, affluent Pelham suburb. His parents, who are divorced, have not returned calls to AL.com for comment. His father runs a successful construction company; his mother works for a veterinarian. Several years ago, when he was 19, Green started Southern Ruckus, an online blog documenting his love for extreme sports and photography.

"I enjoy racing motocross, skateboarding, long boarding, skim boarding, surfing, wake skating, winching, throwing rock, exploring, raising hell, and Filming everything,'' Green wrote on his website. "I have figured out exactly what I want in life through the extreme sports I am around and involved with. I like getting footage!"

Davis said she has no idea why Green did what police say he did. "He's a murderer. You can never understand the mind of a murderer,'' she said. "It's something us as good human beings can't image."

"It's not a race thing,'' she said. Green is white; Pitts was black. "It's a right or wrong thing."

She said she and her sister will do what it takes to keep Green in jail. "We're trying to get justice for my mother, but we're trying to make sure no one else ever has to experience this again. We will fight against aggressive drivers."

In addition to her two daughters and grandson, Pitts, a California native, also left behind a 14-year-old son. She was in the process of getting her master's degree in psychology and planned to open a non-profit organization to help battered women and children.

"My mother was a beautiful, hardworking lady, a loving person who always provided,'' Davis said. "The focus needs to be on my mother losing her life. He will never see daylight again."

Updated at 4:37 p.m. to show Green is the grandson of former Birmingham Mayor Cooper Green.